Detailed sailboat specifications and datasheets since 2015
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Hobie Cat 21 SE

Sailboat specifications

The Hobie Cat 21 is a 21’4” (6.48m) double handed sport/beach catamaran designed by Hobie Cat Design Office (United States) and John Wake (United States). She was built between 1987 and 1990 by Hobie Cat (United States). The SE version comes with the basic equipment needed to start sailing.

Hobie Cat 21's main features

Model
Hobie Cat 21
Version
SE
Hull type
Catamaran
Category
Double handed sport/beach catamaran
Sailboat builder
Sailboat designer
Country
United States
Construction
GRP (glass reinforced polyester):
Sandwich foam fiberglass vinylester
First built hull
1987
Last built hull
1990
Appendages
Centerboard : twin pivoting centerboards
Helm
Single tiller
Rudder
Twin semi-spade rudders
Unsinkable
No
Trailerable
Yes
Former French navigation category
6
Standard public price ex. VAT (indicative only)
N/A

Hobie Cat 21's main dimensions

Hull length
21’ 4”6.48 m
Waterline length
20’ 6”6.25 m
Beam (width)
10’3.05 m
Draft
3’ 1”0.94 m
Draft when appendages up
0’ 11”0.27 m
Light displacement (MLC)
639 lb290 kg

Hobie Cat 21's rig and sails

Upwind sail area
315 ft²29.26 m²
Downwind sail area
541 ft²50.28 m²
Mainsail area
229 ft²21.28 m²
Jib area
86 ft²7.98 m²
Asymmetric spinnaker area
312 ft²29 m²
I
 iFore triangle height (from mast foot to fore stay top attachment)
21’ 8”6.6 m
P
 iMainsail hoist measurement (from tack to head)
29’ 11”9.11 m
Rigging type
Sloop Marconi fractional
Mast configuration
Fore beam stepped mast
Rotating spars
Yes
Number of levels of spreaders
1
Spreaders angle
Swept-back (diamond)
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire continuous

Hobie Cat 21's performances

Crew
2 / 3
Trapezes
2 set(s)
Upwind sail area to displacement
 iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.

The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size.

Upwind: under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 25 it indicates a fast sailboat.
719 ft²/T66.78 m²/T
Downwind sail area to displacement
 iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.

The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size.
1235 ft²/T114.76 m²/T
Displacement-length ratio (DLR)
 iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The DLR is obtained by dividing the boat's displacement in tons by the cube of one one-hundredth of the waterline length (in feet).
The DLR can be used to compare the relative mass of different sailboats no matter what their length:

a DLR less than 180 is indicative of a really light sailboat (race boat made for planning), while a DLR greater than 300 is indicative of a heavy cruising sailboat.
34

Hobie Cat 21's auxiliary engine

Engine(s)
Outboard engine
Engine(s) power
3 HP

Hobie Cat 21's accommodations and layout

Cockpit
No cockpit
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